204807049 has 4 divisors (see below), whose sum is σ = 211413760. Its totient is φ = 198200340.

The previous prime is 204807047. The next prime is 204807079. The reversal of 204807049 is 940708402.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940708402 = 2 ⋅470354201.

It is a cyclic number.

It is not a de Polignac number, because 204807049 - 2¹ = 204807047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204807047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3303309 + ... + 3303370.

It is an arithmetic number, because the mean of its divisors is an integer number (52853440).

Almost surely, 2^204807049 is an apocalyptic number.

It is an amenable number.

204807049 is a deficient number, since it is larger than the sum of its proper divisors (6606711).

204807049 is an equidigital number, since it uses as much as digits as its factorization.

204807049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6606710.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 204807049 is about 14311.0813358041. The cubic root of 204807049 is about 589.4518023971.

The spelling of 204807049 in words is "two hundred four million, eight hundred seven thousand, forty-nine".